Apparatus for gravity liquid separation of solids.



F. 1. DU PONT. APPARATUS FOR GRAVITY LIQUID SEPARATION OF SOLIDS.APPLICATION FILED JAN.25,1910. 1,0 %410 Patented July 15; 191:;

INVEN TOR ATTORNEYJS 3 SHEETS-SHEET 1.

F. I. DU FONT. APPARATUS FOR GRAVITY LIQUID SEPARATION OF SOLIDS.

APPLIGATION FILED JAN,25,1 910.

Patented July 15, 1913.

INVENTOR 4 T0RNEY lil lzl all Fillin I41rlllillrtnlnvlnllliafllol Liliaa 1 F. I. DU FONT. APPARATUS FOR GRAVITY LIQUID SEPARATION OF SOLIDS.

APPLICATION TILED JAN. 25,1910.

Patented July 15, 1913.

3 SHEETS-PERMIT 3.

. IN VENTOR nial WITNESSES ATTORNEYS l ltd ililih lill @TATEtd FBQQNCISI. DU PQNT, 0F 'WILMINC ION, EELdWAEE.

MEARATUS FGRGPAVITY LIQUID SEARATZGN G1? SDLXDS Specification of LettersPatent.

Patented d all? 15, EMS.

original application filed December 1, 1909, Serial No. 530,759. Dividedand this application filed Jennary 25, 1910. Serial. 330. 539,960.

To (ZZZ whom 2'75 may concern Be it known that if, Framers I. DU 'PONT,a citizen of the United States, residing at of Delaware, have invented anew and usefol Improvement in Apparatus for Gravity Liquid Separation ofSolids, of which following is 3 full, clear, and exact descrip- .tion,reference heing'hnd to the accompany ing drawings, which form a partofthis specification. My invention relates to certain apparatus forcarrying out a novel method of gravity liquid separation of solids,which method forms the subject-matter of o separate spylicotion filedDecember 1, 1909, Serial No. 539,759, of which this is a division.

In my method inst mentioned 1 use it liquid other than water which iscapable of being vaporized so that any liqnidcot ried 06 in theseparated ingredients may be venorizedend thus removed from the ore andmay be condensed and returned to the separating vessel. The liquid mayeither he of greater density than one of the ingreclients and less thanthet of the other, or of greater density than Water, but of less densitythan either ingredient to be separated. Speaking generally, the ore tobe separated, for example, limonite, in a divided condition is con c edinto a vessel containing this liquid -ncti may be .stennic chlorid whichhas s'specific gravity of 2:27, is l quid at ordinary temperature, andvaporizes at 114; C. it the specific gravity o'r" the liquid is greaterthan that of one ingredient, the s icions materiel and the iron oreconta1ning iron cxid and ,silicious meterial, and the Sj )3'*ifi6gravity of the liquid being less than purer iron oxid it, the purer ironoxid, 1 ll sink, or tend to sink, to the bottom, and ingredients named,the silicious and the iron on containing iron 'cions material 1 rise ortend to the surface. if the liquid be of specific gravity than water,but less specific gravity than either ingredient, the increase of thelessening of the tendency of the lis'hter ingredient to sink as thespecific or: vitv ot the liquid becomes greater, in foster the does thecorresponding tendency of the heavier ingredient. Hence lighteringredients rise more readily to the surface tmn the heavieringredients. While till-S vessel c aining this liquid Wilmington, countyof Newcastle, and Statei g I i l l l en of apparatus.

the upper portion of the liquid is caused to flow in one direction andthe lower portion of the liquid in the other direction, thus there is acontinuous flow the apparatus. Agitation is also produced therein. Theingredients in the upper portion of the liquid pass to one end of theapparatus, and the ingredients inthe lower portion to the other end ofthe apparatus. The material at each end being carried free from theliquid, except from such ss'etlhercs to the particles, into and througha heating chamber where any liquid. carried or? is veporized, the vaporsare returned to the separating vessel Where they are condensed to greatan extent as possible, the excess not condensed being; condensed acondenser and returned to the separating vessel.

It will now describe the embodiment of nay apparatus illustrated in theeccompanymgdrewings,

Figure l is an elevation of my apparatus pertu lly broken away. Fig. 2is a longitudinol section 3 is s. longitudinal section through one Figs.4-, 5 and 6 are sections resiectively on the lines l-44 5-5 and 66 of 7's a. partial view showing inodiiic end, 0

the coniand c. it tube through which the ore f is the receiving hopperopening into the tube (2.

yrs a pipe extending from the tnbe d and connected with the suctiondevice ii. t e vent any air entering the cylinder with the ore. Theinterior of the cylinde hes the projecting spiral lilzidc 1-5 which 3)the l x "'v oi ore to he linionile, a liquid is of Writer and of res.ingredients of the ore.

The end th shaft carrying the conens, not shown ed ts extens is are sup-3, and thee rollers ore of the liquid in through separating drum.'

to 'Pil d posses intothe cylinder (1-. in me interior of this tube isthe conveyor for carrying the ore through the tube 7 l ,1 1. cor iswhich is fOl/lifid by ill? . rangement the space between the pipes 20denser y to the reservoirthe liquid in pipe rotated by means of thegearing m. In the i conical end b is the peripheral sectional proljecting spiral blade 11, the sections being staggered with respect toeach other, so as to leave a space between them. In the conical end 0 isthe spiral blade p, some of the turns of whichhave orifices 1. Beyondthe conical ends I) and care the cylindrical portions 9 and 3, eachprovided with conveying blades 25. These cylindrical portions terminatein the hoppers u and 2) respectively. The cylindrical portions 7' and 8each extend through a furnace in which the liquid is driven off in theform of vapor. Each oi. l the hoppers u and c has a slide operated bythe lever Z for closing the discharge end ot the hopper and preventingthe ingress oi air. The exterior of the cylinder (0 has water sprayedupon it from the sprayer 2, fed by the pipe 3.

In order to determin the level of the liquid in the cylinder andmaintain its level constant, I use the following construction: 4 is apipe which passes centrally through the conical end I) and itscylindrical extensionand terminates in the reservoir 5, Whicliisnon-rotatably mounted. Surround ing pipe 4 is a sheet metal pipe 9.0,havmg an open end in cylinder a. The gas from the interior of cylinder apasses into the space betweenthe two pipes 20 and 4t. m is a pipeleading from pipe 20 to condenser 3 On this pipe is the suction 't'anFrom the top of the condenser y, pipes 11 lead to the respective hoppersu and o. By this arand a is maintained cool, thus maintaining 4; as aliquid. The inner end of pipe 4 terminates in the reservoir 6. From thisreservoir 6 extend the curved ended pipes 7, the months of which are atthe desired level of the liquid in the cylin' der. Extending through thepipe 4 is a smaller pipe 8, the inner end of which passes throughreservoir 6 and opens into cylinder (1, the outer end terminating inthe. pipe 9, having curved ends, in the reservoir 5. pipe 25 leads fromthe lower end of con- 5. When the cylinder a, its conical ends, andextensions are revolved and the material fed therein, and liquid beingin the cylinder to the level shown, there is a circulation of the liquidas shown by the arrows. The lighter ingredients are carried to theconical endc and the heavier to the conical end 6, the heavier andlighter ingredients separating during t is travel. In the conical end I)the blades carry the heavier ingredients forward and up- Ward, and dueto the staggering of tie blades, the liquid runs off so that when thecylindrical extension is reached, it is free from all butthe adheringliquid. Further movement in'the cylindrical extension carries it throughthe evaporator, thetumesl spiral may be perforated,

liver it. to reservoir 9 same forms passing back to cylinder a. wherethey are condensed by the spray. In a" similar manner when the lighteringredients are carried to the conical. end I, the blades, as itwvere,skim oil the solids, through the orifices. ll? desired, as shown in Fig.7, only the first few turns of the as this may be sutticicnt to carryiolt' practically all the liquid and the renminder of the spiral may bestaggered, as shown with respect to the spiralin end I), Fig. 2. Thismaterial in this cylindrical extension, as was done with respect to theheavier ingredient, passes through the evaporator, the gases returningto the. cylinder a where they are condensed. it the liquid tends torise, in the cylinder beyond its desired height, the pipe 7 will catchit and through reservoir 6 and pipe l de- By means of the gage 10 inconnection with said receiver, the height of the liquid in the reservoir5 truly readily be determined. The pipe 9 will constantly deliver liquidfrom reservoir 5 to the cylinder, but, being smaller, always in lessquantity than it. would be delivered from the. cylinder a to thereservoir 5, it' u. should contain an excess. This, with the liquidpassing through the pipes between the condenser and reservoir 5, enablesthe level of the liquid in the cylinder to be maintained.

The purpose of the system of piping, fan and condenser a, 2 and 1 is toinsure definitely that the (low of vapor shall be trom the. evaporatorsto the central cylinder which is cooled; also to condense any excess 0vapors which may not be condensed in the cylinder a. The purpose of thereturn pipes '11, is to avoid the necessity for the entrance of any moreatmospheric air than is absolutcly unavoidablca using in place thereofair always charged witlrwhatever amount of vapors it will contain, afterhaving passed through the condenser, this, therefore, produces asubstantially closed system in which no vapors or substantially novapors are carried off by any'entering or escaping air, The purpose ofthe fan 71. and pipe 9- is to determine sufficient suction in the pipe 6to balance the tendency of the entering solids to carry air iiito thecylinder a.

It may be seen by this apparatus not only is separation readily made,but there is practic-ally no loss of liquid used as the separatingmedium, there being a circulation back of the absorbed liquid ofseparation. Finally, the apparatus is practically a sealed apparatus.

I do not claim 'in this application the processor method hereindescribed as the the subject1natter of an application filed byInc-December 1st, 1909, Serial No. 530,759, of which application', thisis a. division.

Having now fully described my invention,

the liquid escaping what I claim and desire to protect by Letters Patentis 1. In an apparatus for gravity liquid separation of solids, incombination,.a revolving cylinder adapted to contain the separatingliquid, conical endsprojecting from said cylinder, an inner peripheralcontinuous spiral blade in said cylinder, aspiral blade formed ofstaggered sections in one conical section, and a spiral" blade formed inpart of perforated sections, and in part of staggered sections in theother conical section.

2. In an apparatus for gravity liquid separation of solids, incombination, a revolving cylinder adapted to contain the separatingliquid, conical ends projecting from said cyllnder, means to circulatethe liquid longitudinally .of said cylinder, and means to convey thematerial through the conical ends and away from the liquid.

3. In an apparatus for gravity liquid separation of solids,-incombination, a rotary cylinder adapted to contain the'sepa-.

rating liquid, means to circulate the liquid longitudinally'of saidcylinder, and means to convey the material carried to each end of thecylinder away'from the cylinderand from the liquid.

4. In an apparatus for gravity liquid separation of solids, incombination, a rotary cylinder adapted to contain the separating liquid,means to circulate the liquid longitudinally of said cylinder, means toconvey the material .carried to each end of the cylinder away from thecylinder and from the liquid, a cylindrical tube, means to convey thematerial, leaving said ends through said tube, 'and a source of heatthrough which said tube extends.

5. In an apparatus for gravity liquid separation of solids, incombination, a rotary cylinder adapted to contain the separating liquid,means to circulate liquid longitudinally of said cylinder, means toconvey .the materialicarried toeach end of the cylinder away from thecylinder and from the liquid, a cylindrical tube, means to convey thematerial leaving the cylinder through said tube, a source of heatthrough which said tube extends, and hoppers into which the tubesterminate.

6. In an apparatus for gravity liq- "uid separation of solids, thecombination with the rotary cyl1nder,.of a non-rotatably mountedreservoir exterior of the cylinder,

the cylinder.

a reservoir in the cylinder, a pipe connecting said reservoirs, having acurved end,-a pipe opening into the reservoir in the cylinder having acurved end extending to the desired liquid level and a gage in thereservoir exterior of the cylinder.

7. In an apparatus the rotary cylinder, of a non-rotatably mountedreservoir exterior of the cylinder,

areservoir in the cylinder, avpipe connecting said reservoirs, having acurved end, a

for, gravity liquid separation of solids, the combination with der, thepipe connecting the two reservoirs and the pipe connecting the reservoirexterior of the cylinder and the cylinder, of a tube or pipe surroundingsaid pipes and opening at one end into the cylinder, a condenser and apipe connecting said condenser and said surrounding pipe at a pointexterior of the cylinder, a suction device on saidconnecting pipe, apipe connecting the liquid portion of said condenser and the reservoirexterior of the cylinder, hoppers to receive the materials separated inthe cylinder, and pipes connecting the vapor portion of said condenserand said hoppers.

9. In an apparatus for gravity separation of solids, the combination ofa separatorg j evaporating means, a condenser, means forf passing theseparated ingredients from the separator through the evaporating means,

return means from the condenser to the separator, and means intermediatethe evaporating means and the condenser for dischargingthe separatedsolids, the system being otherwise closedagainst the discharge ofmaterial.

hereunto set my hand, at Philadelphia, on this 22nd day of January,1910.

Witnesses M. M. HAMILTON, A. M. URIAN.

-- .0 5:, In testimony of which invention, I have- FRANCIS 1.1m PONT.

